JP3405228B2 - Automatic toll collection system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic fee collection system using wireless communication.

[0002]

2. Description of the Related Art In a conventional automatic toll collection system, when a vehicle not equipped with an in-vehicle wireless device enters a dedicated lane for automatic toll collection or a mixed lane with general vehicles, the system is operating normally. Does not perform normal communication in the communication area, the traffic light turns red and stops temporarily,
A staff member will collect the fee.

Although the communication area of the tollgate is limited by the beam forming array antenna of the roadside radio device, etc., the vehicle outside the communication area may be affected by the margin of the communication line or the variation of the receiving sensitivity of the onboard radio device. Communication with may be established. When a vehicle enters the tollgate at a very short inter-vehicle distance due to heavy traffic at the tollgate, the preceding vehicle does not have an in-vehicle wireless device, and immediately after that, a following vehicle with an in-vehicle wireless device enters. If you estimate the case
Communication is established when a succeeding vehicle outside the communication area receives a leaked radio wave from the communication area, and the roadside wireless device recognizes that the preceding vehicle is communicating, and the preceding vehicle that does not have the in-vehicle wireless device is installed. May pass through the toll booth without paying the fee.

Further, even if the preceding vehicle is equipped with the on-vehicle wireless device, when the mounting position is not appropriate or the reception sensitivity is not so good, the on-vehicle wireless device and the roadside wireless device of the following vehicle outside the communication area are There is a possibility that a fee may not be collected from the preceding vehicle even though the preceding vehicle carries the communication and the onboard wireless device is mounted on the preceding vehicle.

As a conventional example for solving such a problem,
For example, Japanese Patent Laid-Open No. 7-6236 discloses an automatic toll collection system for measuring the position of a communication vehicle.

FIG. 5 shows a conventional erroneous communication prevention system.
In this system, as shown in FIG. 5, an infrared communication device IRK, an IR beacon IRB, and a video device N are installed at a tollgate.
V, a radar device RD for capturing the positions of all vehicles FZ1, FZ2, FZ3, an infrared video device IVR, and an infrared signal generator R are additionally provided in the vehicle.

In this system, the infrared signal OS is transmitted from the vehicle FZ1 and the vehicle position is detected by the infrared video device IVR at the same time when the communication for collecting the fee is completed. All vehicles FZ1, FZ2,
Since the position of FZ3 has been captured, the unpaid vehicle FZ2 is identified by matching the infrared video with the radar information in the correlator COR of the control evaluation unit SAE. This conventional system requires the large number of additional devices described above, which complicates the system configuration and increases the cost of the entire system.

[0008]

The communication area of the tollgate is limited by the beam-forming array antenna of the roadside wireless device, etc., but if the margin of the communication line and the variation of the receiving sensitivity of the onboard wireless device are assumed. , Communication with a vehicle outside the communication area may be established. When a vehicle enters the tollgate at a very short inter-vehicle distance due to heavy traffic at the tollgate, the preceding vehicle does not have an in-vehicle wireless device, and immediately after that, a following vehicle with an in-vehicle wireless device enters. When the vehicle comes in, the succeeding vehicle outside the communication area receives the leaked radio wave from the communication area to establish communication, and the roadside wireless device recognizes that the preceding vehicle is communicating, and the onboard wireless device is installed. There is a possibility that a preceding vehicle that has not passed may pass through the toll gate without paying the toll.

Further, even if the preceding vehicle is equipped with the on-vehicle wireless device, when the mounting position is not appropriate or the reception sensitivity is not so good, the on-vehicle wireless device and the roadside wireless device of the following vehicle outside the communication area are There is a possibility that a fee may not be collected from the preceding vehicle even though the preceding vehicle carries the communication and the onboard wireless device is mounted on the preceding vehicle.

An object of the present invention is to prevent erroneous communication by specifying a communication vehicle with a simple system.

[0011]

In order to solve this problem, the present invention provides a roadside wireless device installed at a tollgate such as a toll road and an in-vehicle wireless device mounted on a vehicle passing through the tollgate. In an automatic toll collection system that automatically collects tolls by wireless communication, the first laser light is located at one side beside the driving lane in front of the communication area, and the first laser beam is 90 degrees to the traveling direction of the driving lane. And a first trigger pulse when the vehicle crosses the first laser light and is located on the other side of the side of the traveling lane to receive the first laser light. First to output
And a second laser beam and a third laser beam, which are located on one side beside the traveling lane at the end of the communication area where the vehicle is approaching, respectively with respect to the traveling direction of the traveling lane.
And a second transmitter extending in the direction of 90 degrees + θ toward the inside of the communication area, and a direction of 90 degrees from the second transmitter located on the other side beside the traveling lane at the end of the communication area. A second receiver which receives the second laser light emitted from the second receiver and outputs a second trigger pulse when the vehicle crosses the second laser light; and a second receiver located on the side of the communication area on the side of the second receiver. Then, the third transmitter exited in the 90 ° + θ direction from the second transmitter.
A third receiver which receives the laser light of 1) and outputs a third trigger pulse when the vehicle crosses the third laser light, and a communication area using the first, second and third trigger pulses. A speed detector that detects the speed of the vehicle that has entered, a moving distance detector that detects the moving distance of the vehicle using the data of the speed detector, and a moving distance detector of the vehicle that uses the data of the moving distance detector. A vehicle position detector that detects the position, a received power calculator that estimates the received power value from the vehicle by calculating the distance from the vehicle position to the roadside wireless device, and the received power that the roadside wireless device actually received. The automatic fee collection system is characterized by having a communication judging device for judging normal communication by comparing the received power value estimated by the received power calculator with the value.

According to the present invention, since the communication vehicle can be specified by a simple system, erroneous communication can be prevented.

[0013]

BEST MODE FOR CARRYING OUT THE INVENTION The invention according to claim 1 of the present invention is
In an automatic fee collection system that automatically collects fees by wireless communication between a roadside wireless device installed at a tollgate such as a toll road and an in-vehicle wireless device mounted on a vehicle passing through the tollgate, A first transmitter which is located on one side of the traveling lane before the communication area and emits a first laser beam in a direction of 90 degrees with respect to the traveling direction of the traveling lane, and the other side of the other side of the traveling lane. A first receiver that is positioned at, receives the first laser light, and outputs a first trigger pulse when a vehicle crosses the first laser light;
The second laser light and the third laser light are located on one side of the side of the traveling lane at the end of the communication area where the vehicle is entering, and the second laser light and the third laser light are respectively 90 degrees with respect to the traveling direction of the traveling lane A second transmitter extending inward in the direction of 90 ° + θ and a second transmitter located in the other side of the side of the traveling lane at the end of the communication area and extending in the 90 ° direction from the second transmitter. A second receiver that receives a laser beam and outputs a second trigger pulse when a vehicle crosses the second laser beam, and the second receiver located next to the communication area on the second receiver side. A third receiver for receiving a third laser light emitted from the transmitter in the 90 ° + θ direction and outputting a third trigger pulse when the vehicle crosses the third laser light; 2, the speed of the vehicle entering the communication area using the third trigger pulse Speed detector for detecting the degree, a moving distance detector for detecting the moving distance of the vehicle using the data of the speed detector, and a vehicle for detecting the position of the vehicle using the data of the moving distance detector A position detector, a received power calculator that estimates the received power value from the vehicle by calculating the distance from the vehicle position to the roadside wireless device, the received power value actually received by the roadside wireless device, and the received power An automatic toll collection system characterized by having a communication determiner that compares the received power value estimated by a calculator and determines normal communication, and easily detects the vehicle position within the communication area and communicates. It has an effect that normal communication can be judged by the judging device.

According to a second aspect of the present invention, a fourth laser beam and a fifth laser beam are further transmitted between the first and second transmitters located on one side beside the traveling lane before the communication area. Third transmitters that respectively emit in a direction of 90 degrees with respect to the traveling direction of the traveling lane and in a direction of 90 degrees + θ oblique to the vehicle traveling direction,
A fourth trigger pulse when the fourth laser beam emitted from the third transmitter in the 90 degree direction is located on the other side beside the traveling lane and the vehicle crosses the fourth laser beam. And a fifth laser beam which is located between the second and fourth receivers and which outputs from the third transmitter in the 90 ° + θ direction and which receives the fifth laser beam. And a fifth receiver that outputs a fifth trigger pulse when the vehicle crosses the laser light of
The first, second, third, fourth, and fifth trigger pulses are used to detect the speed of vehicle A that has entered the communication area and vehicle B that is outside the communication area. The moving distance between the vehicle A and the vehicle B is detected using the data of the detector, and the vehicle position detector detects the positions of the vehicle A and the vehicle B using the data of the moving distance detector, The reception power calculator calculates the distance from the position of the vehicles A and B to the roadside wireless device to estimate the reception power value from the vehicles A and B, and the communication determination device actually receives the roadside wireless device. 2. The automatic toll collection system according to claim 1, wherein normal communication is determined by comparing the received power value with the received power value estimated by the received power calculator. The position can be detected and normal communication can be judged by the communication judgment device. It has the effect of say.

The invention according to claim 3 is characterized in that the number of receivers is reduced by one by sharing the second receiver and the fifth receiver, and the automatic fee collection system according to claim 2 is characterized. Therefore, the installation cost can be reduced, the vehicle position in the communication area can be easily detected, and normal communication can be judged by the communication judging device.

According to a fourth aspect of the present invention, instead of the first transmitter, the first receiver, and the first laser beam, a first step plate that detects passage of a vehicle and outputs a first trigger pulse. When,
Instead of the second transmitter, the second receiver, and the second laser light, a second footboard that detects passage of a vehicle and outputs a second trigger pulse, a second transmitter, and a third transmitter 2. The automatic toll collection system according to claim 1, wherein a receiver and a third step plate that detects passage of a vehicle and outputs a third trigger pulse are used instead of the third laser beam. It has an effect that the vehicle position in the communication area can be easily detected and normal communication can be judged by the communication judging device.

The invention according to claim 5 is the automatic toll collection system according to claim 1, characterized in that the angle of θ of the laser light emitted in the direction of angle 90 + θ is smaller than 30 degrees. The vehicle position can be detected at an earlier point in time, the vehicle position in the communication area can be easily detected, and normal communication can be judged by the communication judging device.

According to a sixth aspect of the present invention, a fourth laser beam 90 is further directed to the position of the second receiver in the communication area.
A third transmitter for outputting in the direction of + θ is provided, and a fourth receiver for receiving the fourth laser light is provided beside a traveling lane where the second transmitter is located. The automatic toll collection system according to claim 1, wherein the vehicle position can be detected at an early point in time even if the traveling position of the vehicle is offset to the left or right, and the vehicle position within the communication area can be easily detected by a communication determination device. It has an effect that normal communication can be determined.

[0019]

[0020]

FIG. 1 shows an embodiment of the present invention.
4 to FIG. (Embodiment 1) FIG. 1 is a schematic diagram of an erroneous communication prevention system of an automatic fee collection system according to this embodiment. In FIG. 1, 100 is a first transmitter, 101 is a first receiver, 102 is a laser beam such as a first infrared ray, 103 is a second transmitter, 104 is a second receiver, and 105 is a first receiver. Laser light such as infrared ray 2; 106 is a third receiver; 107
Is laser light such as third infrared light, 108 is a roadside wireless device, 109 is an in-vehicle wireless device, 110 is a vehicle, 111 is a communication area, 112 is a trigger pulse, 113 is a speed detector, 114 is a moving distance detector, 115 Is a vehicle position detector, 116 is a received power calculator, 117 is a communication determiner, 1
Reference numeral 18 is a travel lane end A, and 119 is a travel lane end B.

The operation of the above arrangement will be described below. Driving lane edge A118 in front of the communication area 111
The first transmitter 100 emits a first infrared laser light 102 using infrared rays, for example, in a direction of 90 degrees with respect to the traveling direction of the traveling lane, and the first receiver 101 at the traveling lane end B119 makes it The infrared laser light 102 of No. 1 is received. The second infrared laser beam 105 is emitted from the second transmitter at the end A of the traveling lane at the end of the communication area where the vehicle 110 is approaching in a direction of 90 degrees with respect to the traveling direction of the traveling lane, The infrared laser light 107 is emitted in the direction of 90 ° + θ in the communication area 111.

The second infrared laser light 105 emitted from the second transmitter 103 in the direction of 90 degrees is supplied to the second lane edge B at the second position.
Received by the receiver 104 of the second transmitter 103 to 90
The third infrared laser beam 107 emitted in the direction + θ is received by the third receiver 106 at the end B of the traveling lane. When the vehicle 110 passes between the first transmitter 100 and the first receiver 101, the first receiver sends a trigger pulse t1 to the speed detector 113, and the second transmitter 103 and the second transmitter 103 When passing between the receivers 104, the second receiver sends a trigger pulse t2 to the speed detector 113. Time (t2-t1)
And the speed L of the vehicle entering the communication area 111 is detected by the speed detector 113 from the distance L known between the first and second transmitters.

Next, when the vehicle 110 passes between the second transmitter 103 and the third receiver 106, the third receiver 106 sends a trigger pulse t3, and the moving distance detector 1
14 is a moving distance y from the communication area approach end based on the time (t3−t2) and the speed v detected by the speed detector 113.
To calculate.

Next, the vehicle position detector 115 calculates the vehicle position of the vehicle 110 from the moving distance y and the preset angle θ.

Next, the reception power calculator 116 obtains the distance calculated by the vehicle position detector 115 from the vehicle position of the vehicle 110 entering the communication area to the roadside wireless device,
Predict the expected received power value from the vehicle. The communication determiner 117 receives the received power value from the in-vehicle wireless device 109 actually received by the roadside wireless device 108 and the received power calculator 1
The predicted reception power value of 16 is compared, and if it is within a predetermined error, it is determined to be normal communication, and if it exceeds the predetermined error, communication is established first with a vehicle other than the vehicle 110 in the communication area. Then, it is determined that the communication has started, and it is determined that the communication is erroneous. For example, the communication is stopped.

As described above, according to the present embodiment, the vehicle can be specified by such a simple system and erroneous communication can be prevented.

In place of the first transmitter 100, the first receiver 101, and the first laser light 102, a first footboard for detecting passage of a vehicle, a second transmitter 103, and a second transmitter 103 are provided.
Instead of the receiver 104 and the second laser light 105, a second tread for detecting passage of a vehicle, and a second transmitter 10
Instead of the third and third receivers 106 and the third laser beam 107, a third tread plate that detects passage of a vehicle may be used.

Further, it is desirable that the angle θ of the laser light emitted in the angle 90 ° + θ direction is smaller than 30 ° so that the vehicle position can be detected earlier than when the communication area enters.

As a simpler method, first, second
Transmitters 100, 103, first, second, third receivers 10
1, 104, 106, first, second and third laser light 102,
105, 107, speed detector 113, moving distance detector 1
14, the vehicle position detector 115 and the reception power detector 116 may be omitted, and the communication determination may be made based on only the reception power value of the transmission wave from the vehicle 110, that is, the communication area or the area outside the communication area.

(Second Embodiment) FIG. 2 is a schematic diagram of an erroneous communication prevention system of an automatic fee collection system according to the present embodiment. In FIG. 2, 200 is the first transmitter, 20
1 is a first receiver, 202 is a laser beam such as a first infrared ray, 203 is a second transmitter, 204 is a second receiver, 2
Reference numeral 05 is a second infrared laser beam, 206 is a third receiver, 207 is a third infrared laser beam, 208 is a third transmitter, 209 is a fourth receiver, and 210 is a fourth receiver. Infrared laser light, 211 is a fifth receiver, 212
Is laser light such as fifth infrared light, 213 is a communication area,
214 is a trigger pulse, 215 is a roadside wireless device, 216
Is an in-vehicle wireless device A, 217 is a vehicle A, 218 is an in-vehicle wireless device B, 219 is a vehicle B, 220 is a speed detector 221.
Is a moving distance detector, 222 is a vehicle position detector, 223 is a received power calculator, 234 is a communication determiner, 225 is a traveling lane end A, and 226 is a traveling lane end B.

The operation of the above arrangement will be described below. Driving lane edge A225 in front of communication area 213
The first transmitter 200 emits a first infrared laser beam 202 using, for example, infrared rays in a direction of 90 degrees with respect to the traveling direction of the traveling lane, and the first receiver 201 at the traveling lane end B226 makes it The infrared laser light 202 of No. 1 is received. The second infrared laser light 205 is emitted from the second transmitter 203 at the traveling lane end A225 at the end of the communication area where the vehicle A is approaching in a direction of 90 degrees with respect to the traveling direction of the traveling lane, Infrared laser light 207 is transmitted in the communication area 21.
3 Inward 90 ° + θ.

The second infrared laser light 205 emitted from the second transmitter 203 in the direction of 90 degrees is supplied to the traveling lane end B226.
The third infrared laser light 207 received by the second receiver 204 of the third infrared laser 207 and emitted from the second transmitter 203 in the 90 ° + θ direction.
Is received by the third receiver 206 at the traveling lane end B226.

In addition, the traveling lane end A in front of the communication area
225 third between the first and second transmitters 200, 203
The fourth infrared laser light 210 and the fifth infrared laser light 212 are transmitted from the transmitter 208 of 90 degrees 90 degrees to the traveling direction of the traveling lane and 90 degrees obliquely to the vehicle traveling direction.
Degree in the direction of + θ. The fourth infrared laser light 210 emitted from the third transmitter 208 in the direction of 90 degrees is received by the fourth receiver 209 at the traveling lane end B, and the third transmitter 20
Fifth infrared laser light 21 emitted from 8 to 90 degrees + θ direction
2 is received by the fifth receiver 211 at the lane edge B between the second and fourth receivers 204 and 209.

First transmitter 200 and first receiver 201
The first receiver 201 when the vehicle B219 passes between
Sends a trigger pulse t1 to the speed detector 220,
Between the transmitter 208 and the fourth receiver 209 of the vehicle B21.
The fourth receiver 209 receives the speed detector 2
A trigger pulse t2 is sent to 20. When the vehicle B passes between the third transmitter 208 and the fifth receiver 211, the fifth receiver 211 causes the speed detector 220 to generate a trigger pulse t3.
To send.

Further, when the vehicle A217 passes between the third transmitter 208 and the fourth receiver 209, the fourth receiver 209 sends a trigger pulse t4 to the speed detector 220 to send the second transmission. When vehicle A passes between aircraft 203 and second receiver 204, second receiver 204 sends a trigger pulse t5 to speed detector 220. Second transmitter 203
When the vehicle A passes between the third receiver 206 and the third receiver 206, the third receiver 206 sends a trigger pulse t6 to the speed detector 220. From time (t2-t1) and the known distance L1 between the first and third transmitters, the vehicle B
The velocity v1 of 219 is calculated by the velocity detector 220, and the time (t3−t2) and the velocity v detected by the velocity detector 220 are calculated.
1 and the moving distance detector 221 of the vehicle B219,
The moving distance y1 from between the third transmitter 208 and the fourth receiver 209 is calculated.

Next, the vehicle position detector 222 detects the movement distance y.
From 1 and the angle θ, the vehicle position of the vehicle B 219 outside the communication area is calculated. Next, the speed detector 220 displays the time (t5-
t4) and the known distance L2 between the third and second transmitters, the speed v2 of the vehicle A217 is calculated, and the moving distance calculator 221 determines the time (t6-t5),
Based on the speed v2 detected by the speed detector 220, the moving distance y between the second transmitter 203 and the second receiver 204.
Calculate 2.

Next, the vehicle position detector 222 detects the movement distance y.
2 and the angle θ between the second transmitter 203 and the third receiver 206, the vehicle position of the vehicle A217 in the communication area 213 is calculated.

The reception power calculator 223 is used for the communication area 21.
Vehicle A217 inside 3 and vehicle B21 outside communication area 213
The vehicle position of No. 9 and the distance to the roadside apparatus 215 are obtained, and the predicted received power value from each vehicle is predicted. The communication determiner 224 compares the received power value actually received by the roadside apparatus 215 with the predicted received power value from the vehicle A 217 in the communication area 213 by the received power calculator 223, and within the determined error. If there is, it is determined that the communication is normal and the communication is continued as it is. Further, the vehicle outside the communication area 213 and the roadside wireless device 215 start communication before the vehicle A217 in the communication area 213, and the roadside wireless device 215 The received power value actually received by the communication area 2
When it is close to the predicted received power value of the vehicle B 219 outside 13, the communication is determined to be erroneous communication.

As described above, according to the present embodiment, the vehicle can be specified by such a simple system and erroneous communication can be prevented.

In order to reduce the installation cost, the number of receivers may be reduced by one by sharing the second receiver 204 and the fifth receiver 211.

(Embodiment 3) FIG. 3 is a schematic diagram of an erroneous communication prevention system of an automatic fee collection system according to this embodiment. In FIG. 3, 300 is the first transmitter, 30
1 is a first receiver, 302 is a laser beam such as a first infrared ray, 303 is a second transmitter, 304 is a second receiver, 3
Reference numeral 05 is a second infrared laser beam, 306 is a third receiver, 307 is a third infrared laser beam, 308 is a third transmitter, 309 is a fourth receiver, and 310 is a fourth receiver. Laser light such as infrared rays, 311 is a communication area, 312 is a trigger pulse, 313 is a roadside wireless device, 314 is an on-vehicle wireless device, 315 is a vehicle, 316 is a speed detector, 317 is a moving distance detector, 318 is a vehicle position. A detector 319 is a received power calculator, 320 is a communication determiner, 321 is a traveling lane end A, and 322 is a traveling lane end B.

The operation of the above arrangement will be described below. Driving lane edge A32 in front of communication area 311
1 from the first transmitter 300 to the first infrared laser light 30
2 in the direction of 90 degrees with respect to the traveling direction of the traveling lane, and the first receiver 301 at the traveling lane end B322 makes the first
Infrared laser beam 302 is received.

From the second transmitter 303 at the traveling lane end A321 at the end of the communication area where the vehicle 315 is approaching,
Second infrared laser light 305 and third infrared laser light 3
07 is output in the direction of 90 degrees with respect to the traveling direction of the traveling lane and in the direction of 90 degrees + θ with respect to the inside of the communication area 311.

The second infrared laser light 305 emitted from the second transmitter 303 in the direction of 90 degrees is received by the second receiver 304 at the traveling lane end B322 at the communication area end, and the second transmitter 303 is received. The third infrared laser light 307 emitted in the 90 ° + θ direction from is received by the third receiver 306 at the traveling lane end B322.

From the third transmitter 308 at the traveling lane end B322 at the end of the communication area where the vehicle 315 enters,
The fourth infrared laser light 310 is emitted in the direction of 90 ° + θ toward the inside of the communication area 311, and the fourth infrared laser light 31 is emitted from the fourth receiver at the traveling lane end A321 at the communication area end.
Receive 0.

First transmitter 300 and first receiver 301
The vehicle 315 passes between the first infrared laser light 30 and the first infrared laser light 30.
2 crosses the first receiver 301, the speed detector 3
16 when a trigger pulse t1 is sent to the first infrared ray laser beam 305 passing through between the second transmitter 303 and the second receiver 304 and crossing the second infrared laser beam 305.
Trigger pulse t2 is sent to 16 and time (t2-t1)
And the known distance L between the first and second transmitters, the speed detector 316 detects the entry speed v of the vehicle into the communication area 311.

The vehicle 315 uses the fourth infrared laser light 310.
When the third infrared laser beam 307 is traversed before the third infrared laser beam 307 is passed, the receiver 306 transmits a trigger pulse t3 to the speed detector 316 when passing between the second transmitter 303 and the third receiver 306. Based on the feed, time (t3-t2) and the speed v detected by the speed detector 316, the moving distance detector 31
7 detects the moving distance y1 from the communication area entrance end. From the moving distance y1 and the angle θ, the vehicle position detector 318
Detects the position of the vehicle 315 from the driving lane end A321.

Alternatively, when the vehicle crosses the fourth infrared laser light 310 before the third infrared laser light 307, when the vehicle passes between the third transmitter 308 and the fourth receiver 309. Then, the receiver 309 sends a trigger pulse t3 to the speed detector 316, and based on the time (t3-t2) and the speed v detected by the speed detector 316, the moving distance detector 3
17 detects the moving distance y1 from the communication area entrance end. From the moving distance y1 and the angle θ, the vehicle position detector 318
Detects the position of the vehicle 315 from the traveling lane end B.

From the vehicle position of the vehicle entering the communication area and the distance to the roadside apparatus 313, the received power calculator 319 predicts the predicted received power value from the vehicle. The communication determiner 320 compares the received power value actually received by the roadside apparatus 313 with the predicted received power value calculated by the received power calculator 319, and determines that the communication is normal when it is within a predetermined error. When the determined error is exceeded, it is determined that communication has been established first with a vehicle other than the vehicles in the communication area and communication has started, and it is determined that communication is erroneous.

As described above, according to this embodiment, of the two intersecting laser beams 307 and 311, the vehicle 31 is the first one.
By using the trigger pulse crossed by 5, the vehicle position can be detected early and accurately, and erroneous communication can be prevented.

(Embodiment 4) FIG. 4 is a schematic diagram of an erroneous communication prevention system of an automatic fee collection system according to this embodiment. In FIG. 4, 400 is the first transmitter, 40
1 is a first receiver, 402 is a laser beam such as a first infrared ray, 403 is a second transmitter, 404 is a second receiver, 4
Reference numeral 05 is a second infrared laser beam, 406 is a third receiver, 407 is a third infrared laser beam, 408 is a roadside wireless device, 409 is an in-vehicle wireless device, 410 is a vehicle,
411 is a communication area, 412 is a trigger pulse, 413 is a speed detector, 414 is a moving distance detector, 415 is a vehicle position detector, 416 is a received power calculator, 417 is a communication determiner, 418 is a transmission / reception beam direction adjacent to each other. The side antenna 419 directed to the lane is a traveling lane end A, and 420 is a traveling lane end B.

The operation of the above arrangement will be described below. First, the vehicle position of the vehicle 410 is obtained by the operation described in (Embodiment 1). Received power calculator 4
16 predicts a predicted received power value from the vehicle from the vehicle position of the vehicle 410 that has entered the communication area 411 and the distance to the roadside apparatus 408.

Next, the communication determiner 417 determines the received power value actually received by the roadside apparatus 408 and the received power calculator 4
False communication is determined based on the predicted received power value of 16 and the received power value of the side antenna 418. That is, when the predicted received power value exceeds the determined error, it is determined that communication has been established earlier with a vehicle other than the vehicles in the communication area and communication has started, and the received power value of the side antenna 418 is determined. If it is larger than the specified value, it is determined that the communication is erroneous due to the reception of the transmission wave from the on-vehicle wireless device mounted on the vehicle traveling in the adjacent lane.

As described above, according to the present embodiment, the vehicle can be specified by such a simple system and erroneous communication can be prevented.

[0056]

As described above, according to the present invention, between a roadside wireless device installed at a toll gate on a toll road and an in-vehicle wireless device mounted on a vehicle passing through the toll gate on the toll road, In an automatic toll collection system that automatically collects tolls via wireless communication, the position of a vehicle entering a tollgate can be easily detected from the time when laser light such as infrared rays is crossed, without complicating the system. You can
The effect that normal charge collection can be obtained is obtained.

[Brief description of drawings]

FIG. 1 is a schematic diagram of an erroneous communication prevention system of an automatic fee collection system according to an embodiment of the present invention.

FIG. 2 is a schematic diagram of an erroneous communication prevention system of an automatic fee collection system according to an embodiment of the present invention.

FIG. 3 is a schematic diagram of an erroneous communication prevention system of an automatic fee collection system according to an embodiment of the present invention.

FIG. 4 is a schematic diagram of an erroneous communication prevention system of an automatic fee collection system according to an embodiment of the present invention.

FIG. 5 is a schematic diagram of a conventional erroneous communication prevention system.

[Explanation of symbols]

100, 200, 300, 400 First transmitter 101, 201, 301, 401 First receiver 102, 202, 302, 402 First infrared laser light 103, 203, 303, 403 Second transmitter 104 , 204, 304, 404 Second receiver 105, 205, 305, 405 Second infrared laser light 106, 206, 306, 406 Third receiver 107, 207, 307, 407 Third infrared laser light 108 215, 313, 408 Roadside wireless device 109, 314, 409 In-vehicle wireless device 110, 315, 410 Vehicle 111, 213, 311, 411 Communication area 112, 214, 312, 412 Trigger pulse 113, 220, 316, 413 Speed detection 114, 221, 317, 414 Moving distance detector 115, 222, 318, 41 Vehicle position detector 116, 223, 319, 416 Received power calculator 117, 224, 320, 417 Communication determiner 118, 225, 321, 419 Travel lane end A 119, 226, 322, 420 Travel lane end B 208, 308 Third transmitter 209, 309 Fourth receiver 210, 310 Fourth infrared laser light 211 Fifth receiver 212 Fifth infrared laser light 216 Vehicle-mounted wireless device A 217 Vehicle A 218 Vehicle-mounted wireless device B 219 Vehicle B 418 Side antenna

─────────────────────────────────────────────────── ─── Continuation of front page (51) Int.Cl. ⁷ Identification code FI G08G 1/09 G08G 1/09 D H04B 10/10 H04B 9/00 R 10/105 10/22 (58) Fields surveyed (Int .Cl. ⁷ , DB name) G07B 11/00-17/04 G06F 17/60 G06F 19/00 G01B 11/00-11/30 102 G01S 7/48-7/50 G01S 17/00-17/88 G08G 1/00-9/02 H04B 9/00

Claims (6)

(57) [Claims] 1. An automatic system for automatically collecting charges by wireless communication between a roadside wireless device installed at a toll gate such as a toll road and an in-vehicle wireless device mounted on a vehicle passing through the toll gate. In the toll collection system, a first transmitter that is located on one side of the traveling lane before the communication area and emits a first laser beam in a direction of 90 degrees with respect to the traveling direction of the traveling lane; A first receiver which is located on the other side of the vehicle and which receives the first laser light and outputs a first trigger pulse when the vehicle crosses the first laser light; The second laser beam and the third laser beam are located on one side of the side of the traveling lane at the end of the communication area of the coming side, respectively.
A second transmitter that outputs in the direction of 0 degree and in the direction of 90 degrees + θ toward the inside of the communication area, and 90 degrees from the second transmitter located on the other side of the traveling lane at the end of the communication area. A second receiver that receives a second laser light emitted in a direction and outputs a second trigger pulse when a vehicle crosses the second laser light, and a communication area beside the second receiver. A third receiver that is positioned and receives a third laser beam emitted from the second transmitter in the direction of 90 ° + θ and outputs a third trigger pulse when a vehicle crosses the third laser beam. And a speed detector that detects the speed of the vehicle that has entered the communication area using the first, second, and third trigger pulses, and detects the travel distance of the vehicle using the data of the speed detector. Using the distance detector and the data of the distance detector A vehicle position detector that detects the position of the vehicle, a reception power calculator that estimates the received power value from the vehicle by calculating the distance from the vehicle position to the roadside wireless device, and the roadside wireless device actually receives An automatic fee collection system, comprising: a communication determination device that compares the received power value with the received power value estimated by the received power calculator to determine normal communication. 2. A fourth laser beam and a fifth laser beam are respectively transmitted between the first and second transmitters located on one side beside the traveling lane before the communication area in the traveling direction of the traveling lane. 90 ° to 90 ° and 90 ° to vehicle traveling direction + θ
And a fourth laser beam which is located on the other side of the side of the driving lane and which is emitted in the direction of 90 degrees from the third transmitter while receiving the fourth laser beam. It is located between the fourth receiver that outputs a fourth trigger pulse when the vehicle crosses the laser beam and the second and fourth receivers, and exits from the third transmitter in the 90 ° + θ direction. A fifth receiver that receives a fifth laser beam and outputs a fifth trigger pulse when a vehicle crosses the fifth laser beam, and the speed detector includes the first, second, and The speeds of the vehicle A entering the communication area and the vehicle B outside the communication area are detected using the third, fourth, and fifth trigger pulses, and the moving distance detector uses the data of the speed detector. The moving distance between the vehicle A and the vehicle B is detected, and the vehicle position detector is The data of the distance detector is used to detect the positions of the vehicle A and the vehicle B, and the received power calculator calculates the distance from the position of the vehicle A, B to the roadside wireless device to calculate the distance from the vehicles A, B. The communication determination device determines the normal communication by comparing the reception power value actually received by the roadside wireless device with the reception power value estimated by the reception power calculator. The automatic fee collection system according to claim 1. 3. The second receiver and the fifth receiver are shared to reduce the number of receivers by one.
Automatic fee collection system described. 4. A first transmitter, a first receiver, a first tread for detecting passage of a vehicle and outputting a first trigger pulse instead of the first laser beam, and a second transmitter. And a second receiver, a second step plate that detects passage of a vehicle and outputs a second trigger pulse instead of the second laser beam;
Instead of the transmitter, the third receiver, the third laser light,
The third which detects the passage of the vehicle and outputs the third trigger pulse
The automatic toll collection system according to claim 1, wherein the footboard is used. 5. The angle of θ of the laser light emitted in the angle 90 + θ direction is smaller than 30 degrees.
Automatic fee collection system described. 6. A third transmitter, which emits a fourth laser beam in the direction of 90 ° + θ toward the inside of the communication area, is provided at the position of the second receiver, and the second transmitter is provided. The automatic toll collection system according to claim 1, wherein a fourth receiver for receiving the fourth laser beam is provided beside the traveling lane.